Antiflooding fountain pen



Nov. 2, 1954 a. F. Mu-:ssNx-:R

' ANTIFLOODING FOUNTAIN PEN 2 Sheets-Sheet l l Filed June '7, 1951 l. l l l l l l l l l l l 1 l) Il at@ NOV 2, l954 a. F. MlEssNL-:R'

ANTIFLOODING FOUNTAIN PEN 2 Sheets-Sheet 2 Filed June "I, 1951 United ,States Patent .0 a

ANmooDlNG PEN Benjamin vlvliessner,y Morristown, ,NJ. Application-irme' "1, 'iasnzseriama 230,377 -11 claims. i(cl. 12o-48) This invention relates tofa'ntooding fountain pens and more particularly to improvements -in;this class of pens as disclosed in `-n1y ico-pending patent application Serial No. 160,625, led vMay 8, S11-9150, now YEa'bandoneld. In this 4application 'form lthere Avvmay be some Jobj'ec'stions After the :iirst stroke, Ethe barrel 'Swill be Iparti'allyilled say -to yo, 'lby y'the iirst liillirtg'l'op"eration of 'the-pump, Asubseciuent operations fof 'the lpum'p ywill -eject this ink `unless the point of the. pen lbe "held upright, and weven then lsome of the iiik iin the 1collector `will lbe ejected Fbe'fore `the-fair -ln y"the barr'el f'ows tout. "This results '1in Aink running vdown the A"barrel A:and tonto .the .operators fingers, both "from the iejected 'tin-k 'tand from that fadherfing vto the pen 'end of fthe cbarrel Iaffter fsubm'ersionfin :the y"ink supply lvessel.

the pen end 'and fpouring'linkintozit from :a bottle, or by introducing kit' with ia medicine fdropper; but .this may be objectionable .or inconvenientfand messy. vvThe object =of this present invention therefore, -iis'rto-'ailowlling :lofthe vpen barrel, ithrough 'the apoint tend, fto Nvkeep fthe link and I air fin fthe barrel sealed 'therein until fitseiection finto :the Jcollectorissdesired, and .then son'lyiinirneas'ured amounts. Y 'Ihefpenl of i m'yj-present caseimayemploy 5a @rigid ibariel of any desired material, transparent-or ifopaque. @It z-is Itted with vrany :suitable typ'e of ftop '-endfpumg 'such dior Vvexample as 'thtfdisclosed in rFigure f2 of`=the iabove :mentioned'co-pending application. LfIn the present case -the pen end lcontains fa icoll'ector, :somewhat .similar to the Serial No. 206,678, :filed January ,-1'8, `1951,- :new Patent lNum'ber 225642041, :and with 1a similar Ipempoint, yhood #and nipple, `and :anaaxialiole :through lwhich Vfair .and "tink passes iin .filling #die ipen :and n.which lacts as aan tair breather =-hole 'for .the 'ink collectorY assembly.

iln''the'fpresent-casethe fiorml'of construction utilizes v'arfsleeve type of valve 'which .fis'iutilize'd :in threefpdiierent isnt roi -reeaing rink toghe rm fama nef .nie conector;

:In'ithefs'econd form, t ',-Figure S7 :is .fa :sectionaliview through the upper ipart Tof-theep'en,-thelower part of fwhichyis shown in tFigure Ala;

Figure 7a is fa `Psectional nview through :the lower `part '-off the men, Aithe .top :epart 2offwhic'h 'shownin iFlgure U;

vlradial ylin 'type'shown 1in' Figure ,fof `my Eapplication :pressthe-'air `in fthe Apen-.barrel-4. The-air pressure in the '-z-barrel will :riseuntiltheilateral `-hole 20in the pump tube 16is1passed1throughtthe'sleevetvalve t17and lthe .barrel will vsectiormviewnthrough the pcm the hood end of which 'svhrokenmffisinoeitvis like fthe .fiend shoxvng-in :Figure .ff/u;

. In .the V:diliterientviews uvhereindikefrnumbers greferg,

to corresponding parts and referring to the mst-form, 1is la 'hood tattached to'a connector l2 Iby screw 4threads '3. To the other yend of the lconnector -is -a barrel y4 which :is preferably cemented to the connector 2 againstthe col-lar 5 Jof 'the connector. yIt is tobe notedt'hat-thehood 1 also engages the collar 5.

At the upper or top end ofthe barrel -4 v-is a plug 6 l-wh-ich acts to hold Va pumpfsac 7 securely within'the top of the barrel, cement being .preferably used to make 1an ink tight .joint vCarried Within the plug -`6 :iis an operating rod8fhaving'a knob I'9 and carrying a spring 10`be.tween thekno'b9 and a pin 111 which Yis fastened to the rod 8. The pin 111 Aand one end of the spr-ing 1 0 areseated tin arecess 12-at -the -end Iof the plug 6 which has a 'longitudinally vextending recessor Vgroove 13 'to allowy the pin -11to travel r'back vrand `forth as the rod 8 is operating which is later -to -be described.

The inner `rendofthe pump'sac I7-1is 'curved lbackand anchored at 214 Lto the `rod 8 as. by -cementing Also 'attachedk to Ithe rod as 'by screw .threads 15 `is` a rigid pump tube g preferably of suitable lmetal the opposite end of which islpositioned in a sealing member 117 that -is cemented -to the inner wall of the barrel 4-and I"also to the upper end lof the connector 2 and to the upper end of thecollector `v1.8. ,The end of Athe pump tube-16 that is-normally shown 'in the lsealing member 17 'has a plug 19 securely fastened in thisend of the pump tube. The pump `tube has a lateral hole 20 therein located -cl'osely adjacent to'the sealing member 17 `when v'the pump tube fis in its -normal 'position as shown in rFigure y:1. 'The pump .tube also has 'another 1hole21 therein located closely vad-jacent `the end of the rod 8. The #function of these :holes will rbe presently described. The hood 1 -has-albore 22 large enough -to`1eave'au annular space around .the shank 23 -of the penfpointr .The shank 23 vis Elocated in la recess orlbore .in the end yof the l col-lector 18, which has a smaller bore to receive a breatherand `rller tube 24. ."Thccollector v18-also has Va. 'hole 25 in Aalignment withthe hole through a *stationary breather Iandiillertube 24 vand this hole 2S-extends into f'a recess 26 lin fthe lcolllector vand V'into :which lthe end yof the pump tube '116 gprojectsvvhen X'the pump Irod is pushed `downwardly'as :shown Figure 2.

ltis to 'be l"noted/that the `collector -18 has iin'areas lwithin the v"hood 'forreceivng firik comingfrom the recess 26 by Way ofjhe slit 28 as shown in Figure'.

Intheoperation'of the'fform shownini'gures 1-6 inclusive, lit is to 'b'e noted 'that when fthe jparts are tin the p'ositio'n's'hhown'in Figure `1`the plugfendfof ythe pump tube 16 mormally lxsea'ls the ink 1 reservoir in the' :'barrel 4 llfrom -the col11ector'18. However, when pressure isapplied 'to 'thekn'ob"9 -the I@pump '.tube '216 lis-pushed through the rubber-disc vor selinglmember 17.

If the penis `emptyof :inkand KIthe pump rod'be turned iso vthat the '-pin :1:1 7is aligned with its guideslot13 and'the 2pumprod Sfdepress'ed, the pumpzsac member'7 rwill com- ICC,

Ithen berconnectedithrough the recess 26in thecollector-by tway-#ofthe -hole 21 in the tube 16.. The -'compressedfair "nfthe "barreliwill -then expand yout of `fthe same through the hole 21, tube 16 andhole 20 .into'the clearance .hole

.forrecess f26zand s1it'28 in the collector. lsIt will :be `noted fthat -the .depth -of the recess .26 is 'such Vas ytol allow 'suffircient `movement of .the pump tube 516 :for 'the :full length iof the strokevof the pjump rod E8. The -actio'njust defscribediallowsfthe fair torpass through the axialhole-QS and-the hole -in a stationary-breatherand filler .tube 24 to the 1.extermil vatmosphere. If the pen fpointhas been immersed :in vlink in ra bottle lior *some container,y this -air :will zbubble fu'p vto tre'eatmosphe're. When `the y,pump rod 8 isfreleasedl tliegspring .-10 acts -to return .the pumpfmem- :ber back yto the;iposi.tion `shown in Fig'ure 1. This lreducesf the-air 4pressure in `the Ybarrel reservoir so 4that at- .':mospherie pressure on the-surfaceof ythe ink inthe supdrops by gravity into the barrel. This movement of the ink into the pen continues until the hole 20 in the pump tube has passed back into` the bore of the rubber sleeve valve or sealing member 17. This pump rod compression and release will pump about l cc. of ink into the barrel and this operation is repeated until the ink in the barrel has reached up to or over the hole 21 in the pump tube 16. Any further pump depressions will only serve,

with the pen point down, to expel any excess ink in the barrel above the hole 21 when the hole 20 is still on the collector side of the sleeve valve or sealing member 17.

During this filling operation the ink collector 1S will have become filled with ink which feeds down by gravity and capillary attraction into the longitudinal slit 28 and into the radial capillary spaces or tin area 27 as well as through the annular ink space inside the pen and to the outside of the pen bore 22, through the hole 29.

The filled collecter contains sufficient ink to write several pages and when the collector ink level drops down towards the point end air flows into its upper end through the axial hole in the stationary breather and filler tube 24 and collector 18 to replace the used ink so that air cannot increase or decrease in pressure with respect to external atmospheric pressure due either to temperature variations or to external barometric pressure variations. The ink thus feeds out of the collector to the pen point by gravity and capillary action. The collector 1.8 has sufficient capillary force to retain its ink against the downward flow of gravity, but will allow the ink to ow to he writing point freely, but with no tendency to over- When the initial supply of ink in the collector, resulting from a barrel filling operation as described, is used up the collector may be relled from the barrel by turning the pen point up so that the hole 21 in the pump tube 16 is submerged in ink within the barrel and then oprating the rod 8 and tube 16 as in the barrel filling operation. One or more movements of the said rod and tube will refill the collector with ink as described more in detail with respect to Figure 7.

From what has been said concerning this form of my invention it will be seen that the pen has its main reservoir ink normally sealed therein and it cannot escape into the collector by temperature or atmospheric pressure variations. not leak or iiood hence the objections of conventional pens are overcome, as well as the objections which I have personally found in my experience with many types of pens.

In the form shown in Figure 7 the free end of the barrel 4 is closed with a slightly different plug 30 from plug 6. In this form a spring 31 is located within the recess 32, within the plug 30 that is anchored as by cementing to the barrel 4. Plug 30 has a reduced end 33 which serves to clamp the flexible rubber pump member 34 securely within the end of the barrel. Also carried by the plug 30 is a rod 35 having a cooperating knob 36 fastened thereto or integral therewith. To the inner` end of the rod 35 is fastened a pump tube 37 of suitable material which may be of suitable metal such as shown in Figure 1 or of strong plastic material. The upper end of the pump tube 37 has threads thereon to receive a lock cap 38 which forces the inner end 39 of the pump member 34 into strong locking engagement with cement to the pump rod 35, the pump tube 37 being screwed into the inner end of the rod 35.

In this construction the lower end of the pump tube 37 passes through a plug member 40 of suitable material such as rubber that is cemented along with a force ft to the interior wall of the barrel 4. In this form the collector 41 is somewhat different from the collector 18 of Figure `1 in that it has a recess at its inner end to receive a rubber tube 42 that is cemented into a recess in the collector. Positioned in the bottom of the tube 42 is a relatively soft rubber disc 43 against which the end of the pump tube 37 is normally positioned thereby sealing the tube 37 at its interior end. Along the outer wall of the collector is the slit 2S that connects a space 45 with the space 46 adjacent the fin area of the collector, this fin area having access to the space 47 that opens into an annular space 48 around the shank of the pen as well as to the annular bore 22 around the pen. In this form of my invention when the rod 35 is pulled outwardly against the spring 31, the inner end of the pump tube 37 is pulled away from the disc 43 and out of rubber sleeve Furthermore, this pen construction can- 42 so that the open end of the pump tube will allow air or ink to move into the space 45 and through the connecting space 46 via slit 28 from the pen point. It may be noted in passing that the longitudinal hole in the pump tube 37 is about .050ths of an inch which I have found to give satisfactory operation.

To fill the pen reservoir barrel the pump knob 36 is pulled out and released a couple of times, with the point end of the pen immersed in ink in a container. As the knob is pulled out the volumetric space occupied by the pump in the barrel decreases, thus reducing the internal air pressure in the barrel. This continues until the free end of the pump tube 37 emerges from its encircling rubber tube 42, at the end of this outward pump stroke. Ink then tiows into the barrel by way of the axial bores in the breather and iiller tube and collector, the lateral hole in the collector, the longitudinal slot 28 in the collector inside the connector, to the space 45 between the end of the connector and the barrel plug 4) and then through the now openly exposed end of the pump tube 37, through this pump tube out of its upper lateral hole 21 the `same as in Figure l and then falls by gravity to the pen end of the reservoir. With release of the pump rod 35 the spring 31 forces the pump sac to expand in volume, thus compressing the air in the barrel. Air then flows out of the barrel through the lateral hole 21" in the upper end of the pump tube and down through this tube and out of its free end and into the space 45. Thence down along the longitudinal slot 28 and out through the axial bores in the collector and feed bar, whence it bubbles up through the ink in the container to free atmosphere. This outward tiow of air continues until the end of the pump tube enters the inner rubber tube 42 after which the tube end is sealed as heretofore explained. If the pump knob 36 is again pulled out, it will again decrease the pressure of air in the barrel and, as soon as the pump tube emerges from its inner rubber tube closure, the pump will again draw ink into the reservoir as before.

These pumping operations are thus continued until the air in the reservoir has been replaced by ink up to the level of the lateral hole 21" in the pump tube. Should the ink level rise above the level of this lateral hole, the excess ink will be forced out of the barrel through th1s hole, the pump tube and into the collector and ink container, when the pump knob is released, and until the end of this tube is again sealed by entering the rubber inner tube 42 which acts with the member 43 as a valve. In this filling operation, the ink collection spaces in the radial tin section of the collector and the annular spaces around the pen point will become saturated with ink leaving the larger non-capillary axial hole and longitudinal slot free of ink and lled with air. The collector spaces will hold sufficient ink for several' pages of writing, and as this is written out, air flows upwardly into these ink spaces from free atmosphere through the axial hole at the outer end of a stationary breather and filler tube 24, the lateral space 46 and longitudinal slot in the collector, upwardly and downwardly along the collector. With this construction there is no trapped air above the ink in the collector and annular spaces, which feed ink to the point, and the air pressure there is always equal to outside atmospheric pressure, irrespective of its temperature variations or variations of external barometric pressure. When the ink in the collector has been written out, the collector may be reiilled from the barrel reservoir by turning the pen, point up so that the lateral hole 21 in the pump tube is submerged in ink in the barrel and then pulling out and releasing the pump knob. Pulling out the knob draws air into the barrel through the pump tube and this bubbles out of the lateral pump tube hole 21" through the ink to the now upper pen point end of the barrel ink reservoir. Release of the pump knob then expands the pump, compresses the air in the barrel and forces ink through the lateral pump tube hole 21", through this tube up into the collector. One or more such operations will refill the collector with ink after which the barrel then again is sealed from the collector by the normal position of the pump tube 37 forced there by the pump spring 31.

If desired the outward stroke of the pump may be made long enough to carry the free end of the pump tube just beyond the barrel side of the rubber plug.

'1 In this case the collector can be refilled also with the point end of the pen down, since ink will ow directly f fvfaieoenrza @barrel 4'1isof t suitable y'fs'tiff material fand the plug 219 ftat 'thefupperfend of the f-barre'l? is Iforce fitted and Ace'rnented rksame laslin, Figure 7` exceptlth'e'hle '21-y is 'located-'closely adjacentthe 'collar52 that is ifastened` to `thel'pump tube 1rod'i37. "'Within the barrel and fastened to :thelpump tube 37 as by 'agpair' o'flock lnu'ts 53-fisfafpiston54 having Afring rmembers "5S for 'the lusual purpose. 'Inthisform the barrel through the pump 'tube' 37f and V'its ila'teralhle 21", so each outward pull of the pump knob 36 will force air outfofthe lbarrel 1vantllthe returntspi-iugforce stroke will draw ink vinto it-qinrthetillingfoperation.

In refilling the empty collector as stated, thepen is heldfpoint up with the lateral holefZl submergedfinink and `the Atop knob- 36 Fis pulled outwardly until'jtheco1- lector is Illed, `or' with one or more fractional `outward pump kno'b strokes Auntilv-the-collector is filled 'as iobserved inthe open -endofthenpwardly turned "hood fand pen. f:Tlfl'ie alternate modifications 4Vof @design as fs'hown :and described,,obviouslvemploy the'fsame general'principles in each-:casernarnely,jttl'tat-3the pens are easily iilled by a series of pumping operations, that the ink in the --reservoir is rnormally sealed'ftherein and cannot 'berforced outrby temperatureorba1fornetric pressurevariations,y and 'that itcan, -when-fdes'ired i3for relling fthe co1- lector, easily be ejected in small amounts by subsequent pump operations, into` the collector which itself has sufcient capillary force to hold its ink against gravity, and which has an air pressure equalizing connection to external atmosphere, so that its ink feed to the pen point is not disturbed by trapped air pressure irregularities, and flows only by capillary and gravity action to the pen point nibs.

Additionally, as disclosed, these modified designs permit use of the pump whose operating end is normally spring biased against the upper end of the pen, safe from any accidental operation.

- Having thus described my invention, I claim:

l. A fountain pen having a hood and a barrel joined by a connector, a collector having a hollow end and also having a passageway communicating therewith iitting tightly into the connector and preferably terminating flush with the inner end of the connector, the opposite end of the collector being located within the hood and provided at its extremity with a bore, a stationary, breather and iller tube located in said bore, said col` lector having a larger bore concentrically located with respect to the first mentioned bore, a pen having its shank located in said larger bore, said larger bore terminating in said passageway, this opposite end of the coli lector having its outer surface provided with closely spaced iins having a longitudinal ink feed slit crossing the tins and assisting in feeding ink to the iins and to the pen point, a sealing member securely fastened to the inner wall of the barrel as well as to the end of the connector and hollow end of the collector, a plug securely located in the outer end of the barrel, a pump rod reciprocally carried by said plug, a pump tube operatively'connected at one end to said rod with its other end plugged up thereby normally preventing access of ink from the barrel to the collector and this plugged end being slidably located in said sealing member, said pump tube having a lateral hole therein just above the plugged portion therein, said pump tube also having a lateral hole adjacent the inner end of said pump rod and a flexible pumping member operatively connected between the pump rod and the end portion of the barrel for the purpose described.

"f5 l'flowpoi'tionf-when-the pumpod'isf-fgiven fan operative ystroke. v

3. `Aifountain:penas setfor'th Ainclairn El further deliined in that theplug 1in Athe fend of 'the barrel has a 'longitudinal groove-'therein Sand #the pump rod ra pin llol10 cated-iso fthe ,rod iis llnormally held in inoperative 'positi'on bylfthe plug, the -pinbeing s'lidable in said 'plug `'groove lwhen the Irod is arcuately ,turnedk to lbringthe pin 'finto' ial-ignrn'enbwith the groove.

21. fountain penfh'aving a-hoodand barrel connected 'tto` opposite sideshof Aanfannularf'shoulderon a connector,

1a Icolilector fhaving *a portion y'extending through 4'the greater partof the hood and'ihavin'g la fcentrally located holether'ethrough and tins 'on the exterior surface with va'llongitudinal sl-it through the fins and having access "2 lto fink when'it comesfromfthe barrel, saidrcollector hav- `ing 'another portion-:of reduced diameter extending "through the length f of saidl connector 4and having af hole therethrough, v`said hole beingin communicati'on'with 'saidicentrally 'located hole and having a diameter and w),- `lengthfto''ac'e'omm'orlate the'movement of Ia pump tube,

H'- rthercllector'end 'towardthe'pen having Va recess to re- 1ceive"'the p'en-'fs'hank land another recess to `receive a fbrea'therand filler tubehaving a hole -therethrough 'in =.-alignm`ent lwithi the said 'hole fgoing through the collector, 1 30 la's'sea'ling -member=over "the ends vof the 'collector and lfc'onnector-within fthe fbarrel' and havingfa hole vtherein 'in falignment' ith-the1'ho'le in'that portion of the lcollector fof reducedf'dia'meter, a plug in the free end of-thebarrel y'and having a guide 'slot therein, a ,pump 'rod' sli'da'bly 35 .carrie'diby'lsaid plug andhaving a pin locatedto hold'the pump rod ynormally 1n inoperative positionlbut arranged *to Ym'oveintosaid sloton turningi'the rod, Va A pump 1 tube vIfastened lt'o said rod Ian'dflex'tending VVinto said sealing member,`fthis-"end'of theppump tube'fbeing plugged for a lo distance la'bout thefthickn'ess'ofthetsealingfmember, also this endof tthe pump 'tu'b'ehavin'g a'lateral hole located adjacentLtheaplug, y'saidfpump tube having another lat- HKeral ih'ole'lne'ar vthe .rend of ltheipump lrod, said *holes in the pump tube acting to control the ow of ink from the barrel to the collector and a flexible compression member cooperatively connected to the pump rod and the plug end of the barrel.

5. A fountain pen as set forth in claim 4 further defined in that the portion of the collector within the connector has a uniform diameter through its length while the portion having the iins has a tapering diameter from the connector toward the pen point where it is the smallest.

6. A fountain pen as set forth in claim 4 further delined in that a spring is associated with the pump rod to return it to normal starting position.

7. A fountain pen having a hood carrying a pen having the usual nibs and circular shank and a barrel fastened to opposite ends of a connector, and a collec- 50 tor having a tin covered portion located within the hood and another portion located within the connector, the fin covered portion having a centrally located hole therethrough with a breather and filler tube extending from the pen nibs into said hole, the collector having a longitudinal slit to pass ink from said centrally located hole onto said fins, means for passing ink from the barrel to the collector, said means including a sealing member cemented to thejinner wall of the barrel and also to the inner ends of the collector and connector, a pump rods having a pump tube attached thereto and extending through said sealing member, this extending end being closed by suitable blocking means and this end being normally slidably located in said sealing member, the pump tube having a lateral hole normally close to said sealing member and another lateral hole in the pump tube close to the end of the pump rod and a flexible compressing member co-operatively connected to the pump rod and the free barrel end for moving the pump rod and pump tube to bring the pump tube to a position where the lateral hole in the pump tube normally adjacent the sealing member is moved below the sealing member and l pump rod to insure its return to normal starting position and further defined in that means are provided for insuring that the rod cannot be accidentally operated.

9. A fountain pen having a hood carrying a pen having the usual nibs and circular shank and a barrel fastened to opposite ends of a connector and a collector having a iin covered portion located within the hood and another portion located within the connector, the collector having a bore concentric With the pen shank to receive the inner end of said pen shank, the hood having a bore at its free end to receive the shank of the pen adjacent the pen nibs, the hood bore being large enough to leave an annular space around the pen point and at least a part of the shank, a hollow breather and filler tube extending from the outer surface of the hood free end through the shank of the pen into said bore in the collector, the collector having an axial hole in alignment with the hollow part of the breather and ller tube, means for passing air and ink from the barrel to the collector, said means including a pressure actuating device and a hand and spring operated pump rod operatively connected to said device together with a pump tube fastened to said pump rod and extending axially through the barrel into part of the collector-and having a lateral hole in the tube located near the union of the rod and tube for passing air and ink from and to the barrel, said pump tube at its inner end being normally closed by suitable blocking means, the pump rod and pump tube being movable to air and ink discharge positions to render said blocking means inert and co-operative means including fins on the collector and at least one intercepting passageway along the length of the connector across the fins for passing air and ink from said tube and barrel through said passageway and iins of the collector when said pump rod and pump tube are in discharge position.

10. A fountain pen as set forth in claim 9 further defined in that the pump tube extends from the pump rod into a part of the collector and against said blocking means where it is normally held by said spring and from which it is released by an outward pull on said rod.

l1. A fountain pen including a hood and barrel with a connector for coupling them together, a pen point having its Lshank extending into the hood, an ink collector 'having an axial bore therethrough and also having one end extending into the hood and the other end into the barrel area, a sealing member having only a single central hole therein and fitting tightly within the barrel wall and located directly over the inner ends of said collector and connector, at least the end of the collector that extends into the hood having radially projecting circular tins thereon extending from a point closely adjacent the hood end of the connector to a point near the shank of the pen point, the collector having a single side slit extending longitudinally of its full length to at least vbring ink to the tins, means for passing air and ink through the collector, said means comprising a pumping device having a pump rod with a compressing member operatively `connected therewith at the free end of the barrel, a pump tube attached to the inner end of the pump rod and extending within the barrel thru the single hole of the sealing member and cooperative means associated with the inner portions of said pump tube and said sealing member brought into operation only by longitudinal movement by said pump tube for controlling the movement of air and ink to the barrel and pen point when the pump rod is operated, said operation being by hand in one direction and by said compressing member in the opposite direction.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,398,800 Regero Nov. 29, 1921 1,464,218 Regero Aug. 7, 1923 1,607,111 Attula Nov. 16, 1926 2,088,938 Ashley Aug. 3, 1937 2,093,701 Zahel Sept. 2l, 1937 2,387,001 Baker Oct. 16, 1945 FOREIGN PATENTS Number Country Date 941,407 France July 19, 1948 635,358 Great Britain Apr. 5, 1950 

